Lightroom font size - Dual monitor

I've just got a new laptop for photo editing, in general it's great but I'm struggling to get Lightroom CC working properly on 2 monitors.

Laptop has a 4k screen, and I'm using a 1080p screen as a second monitor. Trying to work the same way I always have, all the editing happening on one screen, and a full screen preview on the other. Problem is, however set it up, I'll either have normal size fonts on the 4k screen and enormous ones on the 1080, or normal size on the 1080 and tiny on the 4k. I've adjusted the scaling settings within Windows, most programs are now fine, but all the Adobe stuff is struggling.

I've updated Lightroom some weeks ago, and I'm also having this issue with dual monitors. My case is not so extreme, since my laptop screen is 768p and the monitor 1080p, but it's still not possible to work comfortably in the smaller screen.

A temporary solution is to disconnect the monitor's HDMI cable from the laptop every time before opening Lightroom, and then I can connect it and move Lightroom window between screens without the problem. But I hope Adobe releases an update soon concerning this bug.